if you are still having problems installing that OS it is because Microsoft black listed all of the school keys because of all the Pirated windows XP os out thereMicrosoft updates wga - The Inquirer

Its not a school key nor is it a pirated copy.
The install fails before I even enter a key.
And the version I have with sp2 is a legit copy running just fine on a few systems and in my main one. I have a total of 10 uses for that copy and it's in maybe 4 systems.